Typewriting machine



June 29,1926. 1,590,658

' Y J. WALDHEIM TYPEWRITING MACHINE Filed August 21, 1924 :s Sheets-Sheet 1 June '29 1926.

' J. WALDHEIM' TYPEWRITING MACHINE Filed August 21, 1924 s sheets-sheet 5 W Va.

Patented June 29, l2.

unrr'sosre'rss eater-tr DFFECE.

JOHN WALDHEIM, OF ELIZABETH, NEW JERSEY, ASSIGNOR TC UNDERWOOD TYPE- WRITER. COMPANY, OF NEVV YORK,- N. Y., A CORPORATION OF DELAJVARE.

TYPEWRIIING MACHINE.

Application filed August 2 1, 1924. Serial No. 733,286.

This invention relates to sound-deadening cabinets for typewriting machines. There is on. the market the well-known Underwood sound-deadening appliance, shown in the application of C. B. Corcoran, No. 604,468, filed December 2, 1922 (now Patent No. 1,509,828, dated September 30, 1924:),which appliance is in the form of a pack, boxwork or shoe to fit around the frame of themachine, and which is lined with felt to absorb the sound-waves enianatingyfroni thema chine. V y

The present invention is in the 'natureot an improvement on the device disclosed in the above-mentioned application, and an object is to produce a more eilicient sounddeadening casing by'enclosinginore of the machine and still giving'free access to the paper-carriage. To this end, the invention tfil'llfllSBS abort-like portion to fit around the frame of the machine to hug it tightly to hold it on the machine. The rear wall of said box extends upwardly and curves forwardly over the carriage to 'iiorm a canopy, to thus completely .preventthe escape of sound at the rear ofthe machine-and partly at the top of the machine. To further preventthe escape of sound at the sides of the machine, upperside walls are pro vided, which are located a considerabledistance beyond the side walls of the box-like section, so as to provide clearance for the l k- Uid-fOl'lI/h movement or" the typewriter tuiriage. The rear wall and the front walls ext-end laterally to the offset upper side walls to provide further closures. Thus, there is produced sound-deadening cabinet, which, although, it does not-subdue all of the sound, pr-Xcnts the escape of sound to a very large degree. By'so forming the casing with the lower side walls close to the machine iraine, while he upper sidewalls are offset with re spect thereto, the opening in the front oi? the casing, to give access to the carriage, is reduced to aminimum, so as to reduce the escape, of sound from-said casing'to a mini mum.

The 'itront of the box-like portion of the *asing open and formsa T-shaped opening with'the elongated opening in the upper part of the casing, so that the machine may be readily set into the casing irr spective of the position or" said carriage.

The casing'or sound-deadening pack is in the nature of a sheet-metal or die-cast cassubstantially ing, forming substantially a complete on closure with the exceptions above noted, and

is heavily lined throughout with soft, sound absorbing felt or the like, in a manner to offer extensive areas of felt to the action of the sound waves or vibrations all around and under and over the typewriter, whereby said waves arecaught and weakened or absorbed, and the noise of operation 'substantiallyireduced. There is effected reduction in the sound that emanates from, the" extensive paper-and-carriagediandling opening in the top part of the casing, this reduction being due to the sound-absorbing qualities of the paclgso that the operator is less annoyed and distracted than where'prior fOIIHSHOf senile-deadening packs are proved pack, by reason of beingcontinned upward and partly over the top of the can. riage, and upward at the sides to enhood. the carriage as much practicable, notonly increases the area off the soundabsorbing lining that receives and deadens the sound vibrations, but also screens the noise from escaping from therbach andsidcs of the machine, thus relieving from distrac-. tion others who may be stationed at the rear or sides of the ty istshdesk; the device therefore having the natureof a sound-pack at its lower :boxworl: framework-enclosing portion, and a sound-screen at its upper box work or carriage-enclosing port-iong both the paekwand the screen being eiiicient sounds absorbers.

The improved device is distinguishedfrom sound-proof cabinets, which completely en-z close the carriage and have windowsfthrough which the work is visibleuanda'hingegcon-= nection to permit the lifting of the cover to gainaccess to the work, in that the carria e enclosing cover is unitary (preferably lI e-f grail), with the base portion or "the soundpack, and does not needuto be swungnp to reach the work, inasmuch as it is open. 1

The bottom boaworh comprises f oor or sole which may be first screwed onto the bottom of the typewriter framework; and:

used. The iinlit) 'ken away.

to augment the sound-absorbing qualities of the pac.k.-

In one form of the invention, the ,top or roof of the device may in cross-section be given a form resembling a parabola, whereby sound-waves, rising in various backward directions from, the type-striking region,

may be caught by certain portions of the parabola and reflected to other portions of the parabola, and also down into the body of the pack, whereby the time may be prolonged during which the sound is imprisoned and gradually weakened within the pack.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front elevation ofa. typewriter with one form of the present invention applied thereto, parts being broken away.

"Figure 2 is a cross-sectional view taken on the plane indicated by the line 2-2 of Figure 1 and looking in the direction of the arrows.

Figure 3 is a perspective view of the l11- vention shown in Figure 1, parts being bro- Figure 4 is a fragmentary sectional View showing a modified form of the present invention.

Figure 5 is a cross-sectional view of another modification of the present invention applied to a typewriter.

Figure 6 is a spread perspective view of the modification of the invention shown in Figure 5, parts being broken away.

Figure 7 is a side elevation of the invention shown in Figure 5.

The Underwood standard .typewriting machine comprises a main frame 10 having rear and side walls and posts at each corner of the frame. A keyboard extension 11 extends forwardly'of the main frame, in which extension are disposed banks of keys 12 carried by key-levers 13 operating in a guide or'comb-plate 1.4. These key-levers 13 are connected to operate type-bars 15 carrying type 16 to strike a platen 17 carried in a platen-frame 18. Said platen-frame 18 is supportedon a carriage 19 mounted for lateral movement upon the front rail (not shown) and a rear rail 20. Said platen 17 supports a work-sheet 21 which passes over a rear table 22.

The machine illustrated has openings at its top and bottom, and openings in the front,

rear and side walls of main frame 10. The

operation of the ordinary typewriter produces considerable noise, which escapes through these openings and is objectionable. It is desirable to limit as much of this noise as possible. This is accomplished in the present invention by placing the machine in a casing, indicated generally at 23, which encloses substantially the entire machine leaving only a sufiicient opening at the top to insert and adjust the work-sheet 21, and only a suificient opening at the front to permit the insertion of the machine in said casing and to permit the operation of said machine. This casing 23 is formed of a single piece of sheet-metal or die-casting and is lined with thick sound-deadening material, such as soft felt 23*.

Referring to Figures 1, 2 and 3, the casing 23 is provided with a bottom portion or sole 24 extending from the. extreme end of the keyboard extension 11 to a point beyond the rear of the machine. feet 49 of the machine reston said sole 24 when the machine is in the casing.

Formed on each side of said sole 24, a its front end, are upstanding flanges 26 shaped to conform to the shape of the side walls of the keyboard extension 11 and dis posed to engage said side walls snugly for closing the openings therein.

In order to close the openings in the sides of the machine, the casing 23 is provided with side walls 27 extending upwardly to the top of the machine frame. Said side walls 27 are in alignment with the upstanding flange portions 26 on the sole 24. These side walls 27 are composed of heavy resilient felt to snugly engage the corresponding side walls of the machine .and prevent the escape of noise at these points, and clamp the casing on the machine. I

Extending. from the top of said side walls to each side thereof are lateral extensions in which the carriage 19 may move from side to side. Said lateral extensions comprise horizontal portions 28, front walls 29 and end walls 30, said front walls 29 and end walls 30 extending upwardly to substantially the top of the machine. In order to support these lateral extensions and afford a balanced structurebrackets 31 connecting the side walls 27 and the front walls 29 are provided.

It is a feature of this invention to provide means for permitting the, work-sheet 21 to travel freely from side to side inside the casing. This is accomplished by providing a pocket 32 at the rear of said casing 23. This pocket 32 is closed except at the top and extends from the extreme point of movement of the carriage 19 on one side to the extreme point of movement of said carriage 19 on the other side of the machine. The rear wall 33 forming the rear wall of the casing 23 closes the pocket 32 at the rear. Said rear wall 33 extends upwardly above the machine and forwardly to form a cover or top portion 34. As will be noted from Figure 2, said top portion 34 extends forwardly to a point substantially on a line with the middle of the rear table 22. Sulficient space is allowed between the cover 34 and the machine to permit the operator to insert oradjust the work-sheet 21.

The supporting A w l i s en rom Figure :3, t :k ylevers l3 extendgthrongh the'guide plate 14.

Mounted on allUnder ood standard .ma-. chines, above said gu1de plate 14, is a plate;

slides margin guides operated by a handle 37. Between-said plate and the scale25 is an opening in the machine to permit .access to the type and inner mechanism. This opening is closedby a plate'38. .Said plate 38 .is mounted directlyon the frame ofthe machine by means of the upperset of screws 39 usedto fasten plate35 onto the machine, said screws 39 having shanks long enoughto permit them to .pass through theslots 40 on plate 38 and the aligned openings -in plate 35 on the machine frame. By reasonof this constructiomplate 38 maybe readily detached. Said plate 38 has a curved portion 41 which. permits the operator to grasp the handle 37 of the margin guides for moving said guides, and is provided with shoulder portions which are disposed to engage theshoulder portions 42 of the gfront wall 29 of the lateral extensions in ordertocompletely closethe opening at these pointsand also'to stiffen the casing.

Below said guide-plate 1411s an opening through which noise ma escape. To close said opening, the sole 24- as formed thereon an upstandingflange portion 43 (see-Figure 2) extendin upwardly to said plate 14and entirely across the s aid sole 24.

To position themachine in the casing 2 3, brackets 44 carryingpads 45 aremounted 'in said sole 24 at each side thereof.

In orderto operateitheribbon mechanism from the exterior ofthe casing 23,;a shaft 46 protrudes through anopening47 in one of the side walls 27, which shaft 46 is operatively connected to a.transverseribbon shaft on the inside of said machine and is provided with a knurled wheel 48 for operating the same.

The casing 23and the plate 38 are lined with any suitable lnoise-deadeningmaterial, such as soft felt.

In the casing shown in-Figures 5, 6 and/Z, the sole 24 and the upstanding flanges 26 form a single unit, which-unit is mounted dir-ectly onto the bottom of .the'machine by supporting it. on feet49,si1nilarto the usual typewriter supporting feet, by means ;of screws50 which extend upwardly. through said feet. 49 and intothe usual-cornerposts of the machine frame. The bottom of-the machine frame .rests directly on thefiang e portions 51 formed on said sole 24. As will be understood, both the machine andsole 24 are supported onsaid feet. 49. y

The casing shown in these views is pro: vided with rear wall 52 v which s nugly-, en: sages t a x th m hin itraie eaed w ha :QILQPERIILL' I23 and s ee e o h re ept o -o a ta ulat nglwus ng 5 and associated parts which a'recarried on ation of the tab'ula ting levers 56, supportingthe tabulating keys 57, whichlevers 56 extend from the front to thereaipof said ma. chine below its frame, and raise-the plunge: s

in the tabulating -.l10using 5 5,

It'willalso be noted that onthe front of the machinethe pocket 32extends from-the extremeendof one lateral extension to the extremeendof the other lateral extension, the rear all 52 serying asthe front wallof saidpocket 32, andthezbase of said pocket 32 ;resting on the sole24. i

Referring-to Figure ,4, :the.-form of invention, shown. in thisview, is substantially similarto that shown in Figures 1, :2 and 3, except; that the cover-, portion ,34, which forms an extension of rear wall-:33 of the pocket 32, extends considerably higher than the cover shown in Figures 1 2and 3. said cover 3 4,as illustratedin Figure 4, extends forwardlyto a point ,onaplane ith the front of-the machine-and downwardly and rearwardly toa point on afplane with the front of the platen li'. l3y ;reason of hi .c n ruc icn th oper o i pe mi ed to insertthework-sheet 21 intothe machine oradjust thesame, ,and the escape-of noise is confined to the front of the rnachine as will b apparen eml h di ec o take by thenoisewaves as indicated bythe arrows 58.

' In the preferredfm'in of the invention, there isembod ed-m .a singlep ece orele- .ment -a pack. iforu the type writing anachine frame,,saidpack comprising side. vallsfil? and rear wall 52, and-a chamber for the type-: writer, carriage, .saidehamber comprising. floors 28, ends 30, top 34, back 33, and front 29, an opening affording access to the carriage, andv its appurtenances being formed in the. upper portion and front.

of the top and extending-- suhstanti lly theentire length ,thereof, and merging into the front opening. between. the side walls 27 of the pack; the-sheet-receiving .ipocket opening intosaid carriage chamber at the:

Also

machine'frame, and at its upper portion juttingfi fifi dlyva 4, o .afi tacc s ft th etta leim e m sages E c r ia e-returning handle projects through the opening in the top of the carriage-chamber, to the exterior of the pack, and the opening in the top is commodious for convenience in ad work and having bottom, ends, front, back and top all provided with sound-absorbing linings, said chamber open throughout its length. at its top and front to afford access to the typewriter carriage and its appurtenances for manipulation thereof.

2. A sound-deadening pack for a typewrit ing machine, comprising a lower bonwork having a sound-absorbing lining and fitting tightly uponthe framework of the typewriting machine, and surmounted by a carriagechamber unitary with said lower boxwork and having bottom, ends, front, back and top all provided with sound-absorbing nnings, said chamber open throughout its length at its top and front to afford access to the typewriter carriage and its appurtenances'for manipulation thereof, said lower boxwork comprising side and rear walls, and a separate sole or flooring lined with soundabsorbing material and fitted to the typewriting machine base and to said walls.

8. A sound-deadening pack for a typewriting machine, comprising a lower noxwork having a sound-absorbing lining and fitting tightly upon the framework ofthe typewriting machine, and surmounted by a carriagechamber unitary with said lower boxwork and having bottom, ends, front, back and top all provided with soundabsorbing linings, said chamber open throughout its length at its top and front to afford access to thetypewriter carriage and its appurtenances for manipulation thereof, said pack also comprising a front plate having securing means and lined with sound-absorbing material, and at its lower portion covering the typebar opening in the typewriter framework, and at its' upper portion jutting forwardly from the machine to afford access to the settable margin-gages.

4;. A sound-deadening pack for a type writing machine, comprising a lower boxworl-z having asound-absorbing lining and fittingtightly upon the framework of the typewriting machine, and surmounted by a carriage-chamber unitary with said lower boxwork and having bottom, ends, front, back and top all provided with sound-absorbing linings, said chamber'open throughout its length at its top and front to afford access to the typewriter carriage and 1ts appurtenances for manipulation thereof, said lower boxwork comprising side and rear with sound-absorbing material and tightly fitting to the sides of thekeyboard portion of the typewriter framework.

A sound-deadening pack for a typewriting machine, comprising a lower boxwork having a sounclabsorbing lining and fitting tightly upon the framework of the typewriting machine, and surmounted by a carriage-chamber unitary with said lower bozcwork and havingbottom, ends, front, back and top all provided with sound-absorbing linings, said chamber open throughout its length at its top and front to afford access to the typewriter carriage and its appurtenances for' manipulation thereof, and a pocket lined with sound-absorbing material and extending the length of said chamher and opening at its upperend thereinto and closed at its lower end, said pocket receiving the ends of work-sheets pendent from'the rear of said carriage, said boxwork comprising a rear wall which forms the front wall of said pocket.

6. A sound-deadening pack for a typewriting machine, comprising a lower boxwork having a sound-absorbing lining and fitting tightly upon the framework of the typewriting machine, and surmounted by a carriage-chamber unitary with said lower boxwork and having bottom, ends, front, back and top all provided with sound-absorbing linings, said chamber open throughout its length at its top and front to afford access to'the typewriter carriage and its appurtenances for manipulation thereof, and a pocket'lined with sound-absorbing material and extending the length of said chamher and opening at its upper end. thereinto and closed at its lower end, said pocket receiving the ends of work-sheets pendent from the rear of said carriage, said boxwork comprising a rear wall which forms the front wall of said pocket, said boxwork open at its front and having side and rear walls, and also having a sole of sound-absorbing material; the front opening in said boxwork merging with the opening in the front and top of said carriage-chamber.

7. A sound-deadening pack for a typewriting machine, comprising a lower boxwork having a sound-absorbing lining and fitting tightly upon the framework of the typewriting machine, and surmounted by a carriage chamberunitary with said lower boxwork and having bottompends, front,

. formsthe front wall of-said pocket, said boxwork. open at its front-andhaving side and rear walls, and also having a sole of sound-absorbing material; the front-opening in said boxwork merging with the open ing in the front and top of said carriagechamber, and a plate extending across the front of the typewriting machine framework'and lined with sound-deadening material, and covering the type-bar opening in the front of the typewriter framework and formed at its upper portion to afford space for access through the open front of said boxwork to the settable margin-gages.

8. A sound-deadening pack for a typewriting machine, comprising a lower boxwork having a sound-absorbing lining and fitting tightly upon the framework of the typewriting machine, and surmounted by a carriage-chamber unitary with said lower boxwork and having bottom, ends, front, back and top all provided with sound-absorbing linings, said chamber open throughout its length at its top and front to afford access to the typewriter carriage and lts appurtenances for manipulation thereof, said top extending upwardly, forwardly and downwardly from the rear of the pack in a curve resembling a parabola.

9. A sound-deadening pack for a typewriting machine, said machine including a keyboard extension into which a plurality of key-levers extend, a guide-comb through which said key-levers extend, said machine having an opening in its bottom, and an opening in its front below said guide-comb, said pack comprising a sound-deadening sole disposed to engage the bottom of said machine for closing the bottom opening therein, upstanding flanges formed on the sides of said sole adjacent its front and lined with sound-deadening material for dampening said keyboard extension, and means comprising an upstanding flange formed on said sole extending from side to side thereof and faced with sound-deadening material for closing the opening in the front of said machine below the guidecomb.

10. A sound-deadening pack for a typewriting machine, said machine including a f me. a ca ri ge movable sidewise thereof, and. a keyboard extension having side walls, said packcomprising sound-deadening side walls anda sound-deadening'bottom portion or sole, said pack walls snugly engaging said main frame, and said-sole snugly engaging the bottom" of the machine, lateral extensions lined with sound-deaden ing material and forming a chamber in which said carriage 'isdisposed to travel, said chamber open at its front, forward sound-'deadeniing extensions snugly engaging the side walls of the keyboard extension, and a sound-deadening pocket toreceiye the overhanging end of a work-sheet, all of said parts of said: pack forminga unitary-structure.

11. A sound-deadening packfor a typewriting machine, said machine comprising a frame having rear and side walls, said frame having openings in said rear and side walls and an opening at its bottom, and a housing for tabulating levers carried on said rear wall, said pack having sound-deadening rear and side walls closing the openings in the rear and side walls of said machine, and a sole closing the opening at the bottom of said frame, the rear wall of said pack having an opening to receive said housing.

12. A sound-deadening casing for atypewriting machine, said machine including a traveling carriage, a platen for holding a work-sheet mounted on said carriage, said machine having openings at its top, bottom, rear and sides, said casing comprising a sole for closing the bottom opening. in said machine, said sole mounted directly onto the machine, rear and side walls, for completely closing the openings in the rear and'sides, lateral extensions in which said carriage is disposed to travel, a cover for partly closing the opening at the top, said rear and side walls, lateral extensions and cover forming a unitary structure mounted directly onto the machine, and a device for receiving the overhanging end of said work-sheet, to protect it while traveling with said carriage, said device comprising a pocket including front, rear and side walls and a floor extending from the extreme outer end of one lateral extension to the extreme outer end of the other lateral extension, said rear and side walls, lateral extensions, cover and pocket all forming a unitary structure mounted directly onto the machine.

13. A sound-deadening pack for a typewriting machine, said machine having openings at its bottom, top, front, rear and sides, said pack comprising a sole for closing said bottom opening, and rear and side walls for-closing said rear and side openings, said rear wall extending upwardly to form an elongated curved cover, and extending downwardly and forwardly to a point on a line with the frontof the machine for sing saidtop p ning nd n ining the sound-waves except those escaping forwardly of the machine, all the parts of said pack forming a unitary structure. a

, 14. In a sound-deadening casing for a typewriting machine, said machine having openings at its bottom, top, front, rear and sides, said casing comprising a sole for closing said bottom opening, and rear and side walls for closing said rear and side openings, said rear wall forming an elongated curved cover extending upwardly and forwardly to a point on a line with the front of the machine, and downwardly and rearwardly to a point on a line with the front of the platen, suflicient space being allowed to insert the work-sheet under said cover, all the parts of said casing forming a unitary structure.

tending upwardly and forwardly over the carriage, said rear wall extending the full length of the travel of said carriage.

16. A sound-muifling device for a typewriting machine, comprising'an open front and an open top to fit around the main frame of the machine, a rear wall extending upwardly and forwardly over the carriage, said rear wall extending the full length of the travel of said'carriage, and pockets for the overhanging edge of a worksheet, said pockets arranged in front of said rear wall. I

- JOHN WALDHEIM, 

